We're dividing 51024107 by 901 
The aim is to understand the frequency of 901 in 51024107.

Going ahead to step 1:
5 divided by 901 is 0 with a remainder of 5.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 5 leaves us with 5.
Bring next digit (1) of the dividend behind the 5 and repeat the process: 51 / 901

On to step 2:
51 divided by 901 is 0 with a remainder of 51.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 51 to get 51.
Take the next digit (0) from the dividend and append it to 51, then repeat: 510 / 901

On to step 3:
510 divided by 901 is 0 with a remainder of 510.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 510, we get 510.
Grab the next digit (2) from the dividend, add it to 510, then carry on: 5102 / 901

Advancing to step 4:
901 goes into 5102 5 times with a remainder of 597.
Write down 5 as next digit of the result. 
Result so far: 5.0
Deduct 4505 from 5102 and we're left with 597.
Take the next digit (4) from the dividend and append it to 597, then repeat: 5974 / 901

Going ahead to step 5:
901 can be fit into 5974 6 times, resulting in a remainder of 568.
The next digit of our result is 6. 
Result so far: 56.0
Subtracting 5406 from 5974 leaves us with 568.
Take the next digit (1) from the dividend and append it to 568, then repeat: 5681 / 901

Step 6:
5681 divided by 901 is 6 with a remainder of 275.
The next digit of our result is 6. 
Result so far: 566.0
If we subtract 5406 from 5681, we get 275.
Include the next digit (0) from the dividend after 275, then repeat: 2750 / 901

Step 7:
2750 divided by 901 is 3 with a remainder of 47.
Put 3 as the next digit of the answer. 
Result so far: 5663.0
Subtracting 2703 from 2750 leaves us with 47.
Append the next digit (7) from the dividend to 47 and continue with: 477 / 901

Step 8:
477 divided by 901 is 0 with a remainder of 477.
The next digit of our result is 0. 
Result so far: 56630.0
Subtracting 0 from 477 leaves us with 477.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4770, and continue the process.

On to step 9:
When dividing 4770 by 901, we get 5 with a remainder of 265.
Record the quotient 5 as the next digit in the result. 
Result so far: 56630.5
Deduct 4505 from 4770 and we're left with 265.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2650, and continue the process.

Step 10:
If we divide 2650 by 901, we get 2 and a remainder of 848.
Write down 2 as next digit of the result. 
Result so far: 56630.52
Deduct 1802 from 2650 and we're left with 848.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8480, and continue the process.

On to step 11:
The number 901 fits into 8480 9 times, leaving a remainder of 371.
Record the quotient 9 as the next digit in the result. 
Result so far: 56630.529
The remainder is 371 after subtracting 8109 from 8480.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3710, and continue the process.

Step 12:
If we divide 3710 by 901, we get 4 and a remainder of 106.
Record the quotient 4 as the next digit in the result. 
Result so far: 56630.5294
Subtracting 3604 from 3710 leaves us with 106.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1060, and continue the process.

Step 13:
When dividing 1060 by 901, we get 1 with a remainder of 159.
Write down 1 as next digit of the result. 
Result so far: 56630.52941
Deduct 901 from 1060 and we're left with 159.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1590, and continue the process.

Going ahead to step 14:
1590 divided by 901 is 1 with a remainder of 689.
Record the quotient 1 as the next digit in the result. 
Result so far: 56630.529411
Subtract 901 from 1590 to get 689.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6890, and continue the process.

After the division, we end up with 56630.529411 and a remainder of 6.89e-05.